JPS61241110A - Multi-color molding - Google Patents
Multi-color moldingInfo
- Publication number
- JPS61241110A JPS61241110A JP8366985A JP8366985A JPS61241110A JP S61241110 A JPS61241110 A JP S61241110A JP 8366985 A JP8366985 A JP 8366985A JP 8366985 A JP8366985 A JP 8366985A JP S61241110 A JPS61241110 A JP S61241110A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- mold clamping
- primary
- pressure
- clamping pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000465 moulding Methods 0.000 title claims abstract description 28
- 238000002347 injection Methods 0.000 claims abstract description 13
- 239000007924 injection Substances 0.000 claims abstract description 13
- 239000011347 resin Substances 0.000 claims abstract description 13
- 229920005989 resin Polymers 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000003086 colorant Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1635—Making multilayered or multicoloured articles using displaceable mould parts, e.g. retractable partition between adjacent mould cavities
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は２色または２種の樹脂を同一金型内に順次射
出して成形を行う多色成形方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a multicolor molding method in which two colors or two types of resins are sequentially injected into the same mold.
（従来の技術）
この種の成形方法では、金型キャピテイ部に進退自在な
コアを設け、そのコアを前進させた状態にて形成される
キャビティに１つの樹脂を一次的に射出充填したのち、
コアを後退させて、−次成形品とコアとの間にキャビテ
ィを形成し、そのキャビティに他の樹脂を同一型締力の
下に二次的に射出充填しておシ、これにより一次成形品
と二次成形品とが一体となった多色成形品を得ている。(Prior art) In this type of molding method, a core that can move forward and backward is provided in the mold cavity, and a single resin is temporarily injected and filled into the cavity formed when the core is moved forward, and then
The core is moved back to form a cavity between the next molded product and the core, and another resin is secondarily injected into the cavity under the same mold clamping force, thereby completing the first molding. A multicolored molded product is obtained in which the product and the secondary molded product are integrated.
（発明が解決しようとする問題点）
上記従来法にあっては、投影面積の小さいキャビティへ
の樹脂の充填においても、投影面積の大きな方のキャビ
ティへの樹脂の充填に際して設定された型締圧力を用い
ているため、金型は必要以上の応力を受け、特に−火成
形に用いられるキャピテイの投影面積が小さいときには
、金型相互の接触面の面圧が高くなって、金型に変形が
生じ、コアにかじりが生じたりして金型の寿命が短かく
なるばかりか、型締時に必要以上の型締力を発生させる
ため、エネルギーの浪費ともなるなどの問題があった。(Problems to be Solved by the Invention) In the above conventional method, even when filling a cavity with a small projected area with resin, the mold clamping pressure set when filling the resin into a cavity with a large projected area is applied. As a result, the mold is subjected to more stress than necessary, and especially when the projected area of the cavity used for fire forming is small, the surface pressure of the contact surfaces between the molds becomes high, causing deformation of the mold. This not only shortens the life of the mold due to galling of the core, but also causes problems such as a waste of energy as a mold clamping force is generated more than necessary when clamping the mold.
（問題点を解決するための手段）
この発明は上記事情から考えられたものであって、その
目的とするところは、金型に必要以上の型締圧力を与え
ず、かつエネルギーの浪費をも防ぐことのできる新たな
多色成形方法を提供することにある。(Means for Solving the Problems) This invention was conceived in view of the above circumstances, and its purpose is to prevent unnecessary mold clamping pressure from being applied to the mold and to avoid wasting energy. The purpose is to provide a new multicolor molding method that can prevent the above problems.
上記目的による本発明の特徴は、金型キャビティ部に進
退自在なコアを設け、該コアの進退移動をもって、同−
金型内に投影面積が異なる２つのキャピテイを形成し、
その各キャビティに２色または２種の樹脂を一次と二次
とに分けて順次充填する多色成形方法において、一次成
形時と二次成形時の型締圧力を、上記各キャビティの投
影面積と有効射出力に見合った圧力に設定し、その型締
圧力の下にそれぞれの成形を行うことにある。The feature of the present invention for the above-mentioned purpose is to provide a core that can move forward and backward in the mold cavity, and to move the core forward and backward.
Two cavities with different projected areas are formed in the mold,
In a multicolor molding method in which two colors or two types of resin are divided into primary and secondary parts and sequentially filled into each cavity, the mold clamping pressure during primary molding and secondary molding is calculated based on the projected area of each cavity. The pressure is set to match the effective injection force, and each molding is performed under that mold clamping pressure.
（作 用）
上記多色成形方法では、同−金型内にて行なわれる樹脂
の射出充填を、別個の成形として区別し、各キャビティ
の投影面積と有効射出圧力に見合った型締圧力の下に射
出充填を行うことから、金型に対する型締圧力の影響は
小さく、金型の変形及びコアのかじりなどが生じ難くな
り、消費エネルギーも節減される。(Function) In the multicolor molding method described above, the injection filling of resin performed in the same mold is distinguished as separate molding, and the injection filling is performed under a mold clamping pressure commensurate with the projected area and effective injection pressure of each cavity. Since the injection filling is performed at the same time, the influence of mold clamping pressure on the mold is small, and mold deformation and core galling are less likely to occur, and energy consumption is also reduced.
盤３に取付けた雄型１２とからなり、可動盤３は、他方
の固定盤４側に設けた型締シリンダ５の型締ピストン６
と、型締ロッド７を介して連結され、タイバー８に案内
されて開閉移動する。The movable platen 3 consists of a male die 12 attached to a platen 3, and the movable platen 3 has a mold clamping piston 6 of a mold clamping cylinder 5 provided on the other fixed platen 4 side.
are connected via a mold clamping rod 7, and are guided by tie bars 8 to open and close.
上記雄型１１の内部には金型キャビティ部を一次成形用
と二次成形用の２つのキャビティ９，１０に順次区画す
るコア１３と、該コア１３を雌型１１の型面に対し進退
移動させる油圧シリンダ１４とが設けである。Inside the male mold 11, there is a core 13 that sequentially divides the mold cavity into two cavities 9 and 10 for primary molding and secondary molding, and the core 13 is moved forward and backward relative to the mold surface of the female mold 11. A hydraulic cylinder 14 is provided.
また上記キャビティ９．ＩＯＫは、注入路１５ 、１６
がそれぞれ設けてあり、その注入路１５ 、１６のｒ−
トに固定盤２ｔ−通して位置させた２つの射出シリンダ
１７ 、１８の各々がノズルタッチさせである。Also, the cavity 9. IOK is injection path 15, 16
are provided respectively, and the r-
The two injection cylinders 17 and 18, which are positioned through the fixed plate 2t, are in contact with the nozzles.
２１ｔシーケンスコントローラで、−次型締圧力、二次
型締圧力を設定する２つの圧力設定器２１ 、２２がシ
ーケンスコントローラ加からの信号によって該設定圧力
を順次選択し信号を発する設定圧力切換器乙に継げて設
けられており、東に設定圧力切換器おからの信号は増幅
器冴を介して型締回路上に設けられた圧力制御弁５に送
られるようになっている。本実施例では、二次成形用の
キャビティ１０の投影面積が、−火成形用のキャビティ
９の投影面積より大きい場合を例とするので、型締圧力
は一次側が低く、二次側が高く設定されており、その型
締圧力の設定値は下記の式により求められる。In the 21t sequence controller, two pressure setting devices 21 and 22 that set the -next mold clamping pressure and the secondary mold clamping pressure sequentially select the set pressure according to the signal from the sequence controller and output the signal. The signal from the setting pressure switch is sent to the pressure control valve 5 provided on the mold clamping circuit via an amplifier. In this embodiment, the projected area of the cavity 10 for secondary molding is larger than the projected area of the cavity 9 for fire forming, so the mold clamping pressure is set low on the primary side and high on the secondary side. The set value of the mold clamping pressure is determined by the following formula.
但し圧カニ歓ｊ２ 面積：ｃｒｎ２ なお図中５は方向切換弁、２７は油圧源を示す。However, pressure crab kanj2 Area: crn2 Note that in the figure, numeral 5 indicates a directional switching valve, and numeral 27 indicates a hydraulic pressure source.
上記装置による多色成形は、コア１３を油圧により前進
させ、また型開位置にあった可動盤３を高速移動して型
締したのちに、−次型締圧力を与えて行われる。この−
次型締圧力の設定値は、上記式から求められたものであ
って、高速型締後に設定圧力切換益田が一次型締圧力を
選択し、それにより圧力制御弁δを作動させることによ
り生ずる。Multi-color molding by the above-mentioned apparatus is carried out by moving the core 13 forward by hydraulic pressure, moving the movable platen 3 which was in the mold open position at high speed to clamp the mold, and then applying a second mold clamping pressure. This-
The set value of the next mold clamping pressure is determined from the above equation, and is generated by selecting the primary mold clamping pressure by the set pressure switching Masuda after high-speed mold clamping, and operating the pressure control valve δ accordingly.
上記型締シリンダ５によって、金型１に一次型締圧力が
与えられると、射出シリンダ１７からキャビティ９に樹
脂が射出充填され、更に一次的な冷却によって樹脂は、
第２図に示す形状の一次成形品加となる。When primary mold clamping pressure is applied to the mold 1 by the mold clamping cylinder 5, resin is injected and filled into the cavity 9 from the injection cylinder 17, and the resin is further cooled through primary cooling.
A primary molded product with the shape shown in FIG. 2 is formed.
上記−次冷却時間終了後に、油圧シリンダ１４を作動し
てコア１３を後退させ、第２図に示すように、−次成形
品関の中央部にキャビティ１０を形成すると、信号によ
って設定圧力切換器るが、型締圧力を二次を締圧力に切
換え、圧力制御弁５が作動して、上記式により求められ
た設定値による二次型締圧力に増圧される。After the above cooling time is over, the hydraulic cylinder 14 is operated to retract the core 13 to form a cavity 10 in the center of the next molded product, as shown in FIG. However, the mold clamping pressure is switched to the secondary clamping pressure, the pressure control valve 5 is operated, and the pressure is increased to the secondary mold clamping pressure according to the set value determined by the above formula.
上記増圧の後に、射出シリンダ１８から上記キャピテイ
１０に他種の樹脂が射出充填され、更に二次的な冷却に
よって、キャビティ１０の樹脂は、−次成形品園の中央
部に成形された二次成形品３１となる。After the pressure increase, another type of resin is injected and filled into the cavity 10 from the injection cylinder 18, and through secondary cooling, the resin in the cavity 10 is transferred to the second molded product in the center of the next molded product. The next molded product 31 is obtained.
そして冷却時間終了後に、第３図に示すように金型１を
開くと、−次成形品園と二次成形品３１とが一体となっ
た多色成形品３２が、雄型１２から離型される。After the cooling time is over, when the mold 1 is opened as shown in FIG. be done.
（発明の効果）
この発明は上述のように、一次成形時と二次成形時の型
締圧力を、金型内に形成される２つのキャビティの投影
面積と有効射出力に見合った圧力に設定し、その型締圧
力の下にそれぞれの成形を行うことから、金型の受ける
不当な応力を減少することができ、これにより金型の変
形やコアのかじシなどが防止され、金型の寿命が長くな
るばかりか、型締に要するエネルギーの消費を節減する
こともできるなどの利点を有する。(Effect of the invention) As described above, this invention sets the mold clamping pressure during primary molding and secondary molding to a pressure commensurate with the projected area and effective injection force of the two cavities formed in the mold. Since each molding is performed under the mold clamping pressure, it is possible to reduce undue stress on the mold, which prevents deformation of the mold and core cracking, and improves the mold. It not only has a longer lifespan, but also has the advantage of reducing energy consumption required for mold clamping.
図面はこの発明に係る多色成形方法を実施する場合に用
いられる装置の１例を略示するもので、第１図は一部縦
断正面図、第２図は一次成形時の金型の縦断面図、第３
図は多色成形品を離型した際の金型の縦断面図である。
１・・・・・・金型The drawings schematically show an example of an apparatus used when carrying out the multicolor molding method according to the present invention, and FIG. 1 is a partially longitudinal front view, and FIG. 2 is a longitudinal sectional view of the mold during primary molding. Front view, 3rd
The figure is a longitudinal cross-sectional view of the mold when the multicolored molded product is released from the mold. 1... Mold
Claims (1)
退移動をもつて、同一金型内に投影面積が異なる２つの
キャビティを形成し、その各キャビティに２色または２
種の樹脂を一次と二次とに分けて順次充填する多色成形
方法において、一次成形時と二次成形時の型締圧力を、
上記各キャビティの投影面積と有効射出力に見合つた圧
力に設定し、その型締圧力の下にそれぞれの成形を行う
ことを特徴とする多色成形方法。A core that can move forward and backward is provided in the mold cavity, and by moving the core forward and backward, two cavities with different projected areas are formed in the same mold, and each cavity has two colors or two cavities.
In the multi-color molding method in which seed resin is divided into primary and secondary parts and filled sequentially, the mold clamping pressure during primary molding and secondary molding is
A multicolor molding method characterized by setting a pressure commensurate with the projected area and effective injection force of each cavity, and performing each molding under the mold clamping pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8366985A JPS61241110A (en) | 1985-04-19 | 1985-04-19 | Multi-color molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8366985A JPS61241110A (en) | 1985-04-19 | 1985-04-19 | Multi-color molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61241110A true JPS61241110A (en) | 1986-10-27 |
| JPH0515532B2 JPH0515532B2 (en) | 1993-03-01 |
Family
ID=13808877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8366985A Granted JPS61241110A (en) | 1985-04-19 | 1985-04-19 | Multi-color molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61241110A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63265611A (en) * | 1987-04-23 | 1988-11-02 | Toshiba Mach Co Ltd | Injection molding and mold apparatus therefor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS544957A (en) * | 1977-06-14 | 1979-01-16 | Japan Steel Works Ltd | Manufacture of multiicolor and multiimaterial resin moldings |
| JPS55166628U (en) * | 1979-05-19 | 1980-12-01 |
-
1985
- 1985-04-19 JP JP8366985A patent/JPS61241110A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS544957A (en) * | 1977-06-14 | 1979-01-16 | Japan Steel Works Ltd | Manufacture of multiicolor and multiimaterial resin moldings |
| JPS55166628U (en) * | 1979-05-19 | 1980-12-01 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63265611A (en) * | 1987-04-23 | 1988-11-02 | Toshiba Mach Co Ltd | Injection molding and mold apparatus therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0515532B2 (en) | 1993-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3178497A (en) | Methods and apparatus for injection molding | |
| JP4284070B2 (en) | Mold for injection compression molding and molding method using the same | |
| JP2704572B2 (en) | Mold clamping device of molding machine | |
| US5460508A (en) | Resin molding method and apparatus | |
| US3669601A (en) | Apparatus for injection molding | |
| US4464327A (en) | Injection molding of thermoplastics in sandwich mold employing desynchronized injection periods | |
| JPS61241110A (en) | Multi-color molding | |
| JPH0263050B2 (en) | ||
| JP2870630B2 (en) | Molding equipment | |
| JPS63188033A (en) | Molding method for synthetic resin product | |
| JPH06304984A (en) | Injection compression molding device | |
| US6103174A (en) | Mold clamping method for straight hydraulic mold clamping apparatus | |
| JPH06126413A (en) | High speed injection casting device | |
| JPH11314148A (en) | Method for injection-forming metallic material using hotrunner die device and hot-runner die device therefor | |
| JP4218836B2 (en) | Molding agent coating method and injection mold | |
| JPS5967029A (en) | Multilayer injection molding device | |
| JP3234693B2 (en) | Mold clamping device of injection molding machine | |
| KR950005719B1 (en) | Double cylinder cylinder of injection molding machine | |
| JPH01125212A (en) | Injection molding and its device | |
| JP3079487B2 (en) | Mold clamping device of injection molding machine | |
| JP2622300B2 (en) | Injection compression molding method | |
| JPS5686667A (en) | Mold clamping device | |
| SU577088A1 (en) | Injection die casting machine | |
| JPS5989131A (en) | Mold clamping cylinder in straight-hydraulic injection molding machine | |
| JP2508116Y2 (en) | Mold for die casting machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |